[Bug target/36241] Executable compiled with -m64 almost three times faster than the one compiled with -m32 on Core2Duo
ubizjak at gmail dot com
gcc-bugzilla@gcc.gnu.org
Thu May 15 09:22:00 GMT 2008
------- Comment #2 from ubizjak at gmail dot com 2008-05-15 09:21 -------
This regression is due to store forwarding penalty:
...
movl %esi, -408(%ebp)
movl %edi, -404(%ebp)
fldl -408(%ebp)
...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36241
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